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Alpha-silane cross-linked polypropylene and application thereof as 3D printing material

A cross-linked polypropylene and silane cross-linking technology, applied in the field of cross-linked polypropylene, can solve the problems of reduced strength and slow cross-linking speed, and achieve the effect of low cost and important industrial application value

Inactive Publication Date: 2014-01-08
涌奇材料技术(上海)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because polypropylene is very easy to degrade during the grafting process, resulting in a decrease in strength, and even if the grafting is completed well, the speed of subsequent alkoxy hydrolysis and condensation to generate crosslinking is too slow

Method used

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  • Alpha-silane cross-linked polypropylene and application thereof as 3D printing material
  • Alpha-silane cross-linked polypropylene and application thereof as 3D printing material
  • Alpha-silane cross-linked polypropylene and application thereof as 3D printing material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Polypropylene pellets 100 parts

[0040] Diethylpropylbenzene peroxide (DCP) 0.20 parts

[0041] 4.0 parts of α-methacryloyloxymethyltrimethoxysilane;

[0042] Keep the temperature below 15°C and under the protection of nitrogen, mix the above components thoroughly, and then send them to a twin-screw extruder with an aspect ratio of 36 for extrusion, and the speed of the twin-screw extruder is 30r / min; The temperature of each zone is: 160-170°C in the feeding section, 190-200°C in the melting section, 190-200°C in the mixing section, 170-190°C in the exhaust section, 160-180°C in the homogenizing section, and the feeding speed is 15 kg / hour .

Embodiment 2

[0044] Polypropylene powder 100 parts

[0045] Benzoyl peroxide (BPO) 0.25 parts

[0046] 5.0 parts of α-methacryloyloxymethyltriethoxysilane;

[0047]Keep the temperature below 25°C and under the protection of nitrogen, mix the above components thoroughly, and then send them into a twin-screw extruder with an aspect ratio of 36 for extrusion, and the speed of the twin-screw extruder is 50r / min; The feeding section is 150-160°C, the melting section is 190-200°C, the mixing section is 190-200°C, the exhaust section is 170-190°C, the homogenization section is 160-180°C, and the feeding speed is 10 kg / hour.

Embodiment 3

[0049]

[0050] Keep the temperature below 15°C and under the protection of nitrogen, fully mix the above components, and then feed them into a twin-screw extruder with an aspect ratio of 36 for extrusion, and the speed of the extruder is 45r / min; Section 150-170°C, melting section 190-200°C, mixing section 190-200°C, exhaust section 170-190°C, homogenization section 160-180°C, and the feeding rate is 12 kg / hour.

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PUM

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Abstract

The invention discloses a cross-linked polypropylene, the cross-linked polypropylene is alpha-silane cross-linked polypropylene, and the cross-linked polypropylene is composed of the following raw materials in parts by weight: 100 parts of polypropylene, 0.10 to 0.50 part of peroxide, and 2.0 to 6.0 parts of alpha-silane. The alpha-silane cross-linked polypropylene is suitable for being used as a 3D printing material, a foaming material and a stretching-resistant braid material, and applied to other application fields, in which the material can replace nylon; compared to nylon, the material is lighter and more environment-friendly, furthermore, the cost of the material is lower, and thus the material has a very important industrial application value.

Description

technical field [0001] The invention relates to a cross-linked polypropylene, in particular to an α-silane cross-linked polypropylene that replaces nylon for 3D printing materials, foam materials and webbing materials. Background technique [0002] Polypropylene material is a large variety of general-purpose plastics. It has a large output and low price. It is widely used in many fields such as daily use, household appliances, agricultural use, and automobiles. However, polypropylene materials are not resistant to creep due to low toughness, poor rigidity, etc. The disadvantages limit its application as a structural material within the scope of engineering. [0003] For example, the most commonly used FDM (Fused Deposition Modeling) 3D printing materials, that is, the 3D printing materials in the fusion lamination molding technology are nylon and ABS. [0004] Nylon is a general term for thermoplastic resins containing repeated amide groups—[NH-CO]—on the main chain of the ...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08K5/14C08K5/5425C08J3/24
CPCB29B9/06C08J3/244C08J2323/12C08K5/14C08K5/5425C08L23/12
Inventor 姜文
Owner 涌奇材料技术(上海)有限公司
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